package com.itheima.reggie.controller;


import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.itheima.reggie.common.R;
import com.itheima.reggie.entity.Employee;
import com.itheima.reggie.service.EmployeeService;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.util.DigestUtils;
import org.springframework.util.StreamUtils;
import org.springframework.web.bind.annotation.*;

import javax.servlet.http.HttpServletRequest;
import java.time.LocalDateTime;

@Slf4j
@RestController
@RequestMapping("/employee")
public class EmployeeController {

    @Autowired
    private EmployeeService employeeService;

    /**
     * 员工登录
     * @param request
     * @param employee
     * @return
     */
    @PostMapping("/login")
    public R<Employee> login(HttpServletRequest request, @RequestBody Employee employee){
        // 1:将页面提交的密码password进行md5加密处理
        String password = employee.getPassword();
        password = DigestUtils.md5DigestAsHex(password.getBytes());

        // 2:根据页面提交的用户名username查询数据库
        LambdaQueryWrapper<Employee> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(Employee::getUsername,employee.getUsername());
        queryWrapper.eq(Employee::getPassword,password);  // 可代替4号步骤
        Employee emp = employeeService.getOne(queryWrapper);

        // 3:查询结果不一致则返回登录失败结果
        if (emp == null){
            return R.error("登录失败");
        }
//         4:密码不对,如果不一致则返回登录失败结果
//        if (!emp.getPassword().equals(password)){
//            return R.error("登录失败");
//        }
        // 5:查看员工状态,如果为已禁用状态,则返回员工已禁用结果
        if (emp.getStatus() == 0){
            return R.error("账号已被禁用");
        }
        // 6:登录成功,将员工id存入Session并返回登录成功结果
        request.getSession().setAttribute("employee",emp.getId());
        return R.success(emp);
    }

    /**
     * 员工退出
     * @param request
     * @return
     */
    @PostMapping("/logout")
    public  R<String> logout(HttpServletRequest request){
        // 清理session中保存的当前登录员工的id
        request.getSession().removeAttribute("employee");
        return R.success("退出成功");
    }

    /**
     * 新增员工
     * @param employee
     * @return
     */
    @PostMapping
    public R<String> save(HttpServletRequest request ,@RequestBody Employee employee){
        log.info("新增员工,员工信息: {}",employee.toString());
        // 设置出示密码为123456,需要进行md5加密处理
        employee.setPassword(DigestUtils.md5DigestAsHex("123456".getBytes()));
        // 记录创建时间和更新时间
//        employee.setCreateTime(LocalDateTime.now());
//        employee.setUpdateTime(LocalDateTime.now());
        // 记录由谁创建的账号,获取当前登录人员的信息
//        Long empId = (Long) request.getSession().getAttribute("employee");
        // 谁创建的账号和最后更新账号的人
//        employee.setCreateUser(empId);
//        employee.setUpdateUser(empId);
        // 调用方法把对象传过去
        employeeService.save(employee);
        // 返回添加成功
        return R.success("添加成功");
    }

    /**
     * 员工信息分页查询
     * @param page
     * @param pageSize
     * @param name
     * @return
     */
    @GetMapping("/page")
    public R<Page> page(int page,int pageSize,String name){
        log.info("page = {}, pageSize = {}, name = {}",page,pageSize,name);
        // 构造分页构造器
        Page page1 = new Page(page,pageSize);
        // 构造条件构造器
        LambdaQueryWrapper<Employee> queryWrapper = new LambdaQueryWrapper<>();
        // 添加过滤条件
        queryWrapper.like(StringUtils.isNotEmpty(name),Employee::getName,name);
        // 添加排序条件
        queryWrapper.orderByDesc(Employee::getUpdateTime);
        // 执行查询
        employeeService.page(page1,queryWrapper);
        return R.success(page1);
    }

    /**
     * 根据id修改员工信息
     * @param employee
     * @return
     */
    @PutMapping
    public R<String> update (HttpServletRequest request,@RequestBody Employee employee){
        log.info(employee.toString());
//        测试是否是同一个线程在作用
//        long id = Thread.currentThread().getId();
//        log.info("修改线程id为: {}",id);
//        Long empId = (Long) request.getSession().getAttribute("employee");
//        employee.setUpdateTime(LocalDateTime.now());
//        employee.setUpdateUser(empId);
        employeeService.updateById(employee);

        return R.success("员工信息修改完成");
    }

    /**
     * 根据id查询员工信息
     * @param id
     * @return
     */
    @GetMapping("/{id}")
    public R<Employee> getById(@PathVariable Long id){
        log.info("根据id查询员工信息...");
        Employee emp = employeeService.getById(id);
        if (emp != null) {
            return R.success(emp);
        }
        return R.error("没有查询到对应员工信息");
    }
}
